h=1.75
w=80.5
k=w/(h*h)
print('k=%.2f'%k)
if k<18.5:
	print('过轻')
elif k<25:
	pring('正常')
elif k<28:
	print('过重')
elif k<32:
	print('肥胖')
else:
	print('严重肥胖')